Matthew Daddario Joins Chicago Fire Season 15 as a Firefighter Candidate
Matthew Daddario is heading to Firehouse 51. The actor, best known for playing Alec Lightwood across all three seasons of Shadowhunters, has been cast in Chicago Fire Season 15 as a firefighter candidate — the show's term for a rookie still working to earn a permanent spot on the truck. Deadline and TV Insider both confirmed the casting on 21 August 2026.
No further details have been shared about Daddario's character or his storyline, according to TV Insider. His previous credits also include Blue Bloods and Why Women Kill. Deadline
He is not the only new face pulling on turnout gear. Da'Vinchi has also joined Chicago Fire as a series regular in the same firefighter-candidate rank, and teased his own casting with a set photo posted on Thursday, 20 August. Brandon Larracuente, who plays a character named Vasquez, is another recent addition to the ensemble. Deadline
For anyone catching up, Chicago Fire follows the professional and personal lives of the firefighters, rescue personnel and paramedics of Firehouse 51 in Chicago. The series is a Dick Wolf production — the same franchise architect behind the Law & Order and FBI television universes — produced by Wolf Entertainment and Universal Television. Season 15's executive producers include Wolf, showrunner Victor Teran, Reza Tabrizi, Matt Whitney, Anastasia Puglisi, Rebecca McGill and Peter Jankowski. Deadline
Teran takes the showrunner seat after Andrea Newman departed following 14 seasons, meaning the person responsible for the writers' room and day-to-day creative decisions has changed hands heading into the new year. That transition comes with a cliffhanger to resolve: Season 14 ended with former Chief Pascal — played by Dermott Mulroney — returning to discuss his professional options with Severide, before Firehouse 51 was called out to a storage facility fire. Deadline
For fans, the back-to-back castings of Daddario and Da'Vinchi signal that Firehouse 51 is restocking its ranks — and that Season 15 will have at least two new rookies whose futures on the team are not yet decided.
